Automatic sprinkler



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(No Model) 'M. H. HART.

AUTOMATIG SPRINKLER.

No. 552,287. Patented Dec. 31, 1895.

WITNESSES: mmvron ATTORNEY.

UNITED STATES PATENT OF ICE.

MILTON H. HART, OF BOSTON, MASSACHUSETTS.

AUTOMATIC SPRINKLER.

SPECIFICATION forming part of Letters Patent No. 552,287, dated December 31 1895.

Application filed January 12, 1894. Serial No. 496,697. (No model.)

To all whom it may concern:

Be it known thatl, MILTON H. HART, a citizen of the United States, residing in Boston, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Automatic Sprinklers for the Extinguishment of Fires, of which the following is a specification.

My invention relates to that class of sprinklers for the extinguishment of fires in which the sprinkler is closed or inoperative at ordinary degrees of heat, but when the temperature is raised to such extent as is only possi ble in case of a fire the sprinkler will come into action and permit water to flow through it; and it consists of a nozzle of any construction and supplied with any form of orifices, but in practice I intend to useone having slits radiating from the center of the end of the nozzle, so that the water will have a wide range of distribution.

Over the nozzle is placed a cap provided with a lug through which is a hole. In a hole in an arm on one side of the nozzle is inserted one end of a curved spring which passesthrough the hole in the lug and over the cap to the other side of the nozzle. The end of the latter side is ordinarily held down, so as to keep the cap over the nozzle, by means of a link made in two parts, which are soldered together. This link has one end placed over the free end Zof the spring, which is curved upward or otherwise shaped so as to hold the link, and the other under an arm on the side of the nozzle opposite to that in which is the arm holding the spring, this first-mentioned arm being provided with an indentation for the purpose of holding the link. I

Near the inner ends of one part of the link are formed rounded projections or flanges which extend transversely across the ends, and near the inner ends of the other part are formed corresponding recesses in which the projections or flanges on the other part catch when the two parts of the link are put together. These flanges and recesses are necessary, so that as the solder begins to melt and the spring begins to pull the two parts of the link apart the flanges cause them to move outward away from each other.

7 The two parts of the link are shaped like elongated horseshoes-that is, curved at one end and open at the other. The solder used to unite the two parts is to be easily fusible say at a temperature of about 140 Fahrenheit.

The operation of the invention is as follows The cap being placed on the end of the nozzle with suitable washers underneath, one being preferably of very thin metal and the other of rubber, the spring fastened on one side and having the cap attached thereto, as above ex plained, is secured as to its free end by the link over the arm, as above explained. In case of a fire, when the temperature is raised sufficientlysay to 140the solder uniting the two parts of the link fuses and the two parts separate or are pulled apart. This releases the free end of the spring, the cap falls off or is automatically removed, and the water flows through the orifices in the nozzle.

Figure 1 is a side elevation of a nozzle, showing my invention applied thereto in section. Fig. 2 is an end view of the same. Figs. 3 and 4 are detail views.

I have shown in the drawings a side View of my invention.

. dis the nozzle. 1) is the cap. 0 is the spring attached to the arm 01 and passing through the lug e. f is the link placed over the free end of the spring and over the arm What I claim, and desire to secure by Letters Patent, is-

A nozzle, having an arm 9 formed on one side, and cars 61 on the other, combined with a cap, applied to the nozzle; the. pivoted arm a, and the link f; the link being made in two parts and provided with the transverse grooves and flanges, and adapted to catch over both the curved end of the arm 0 and the arm on the nozzle, substantially as shown.

MILTON H. HART.

Witnesses:

A. L. WAITE, CHAS. H. DREW. 

